To be fazed is to be surprised, taken aback, knocked off one's stride.
A phase refers to a period of time, part of a cycle.
I've noticed that a lot of people are now confusing the two.
And here's some more:
To ensure an outcome is to make certain of it.
To insure an outcome is to guard against it, seek compensation if it happens.
To elicit something is to encourage it to emerge (eg a reply).
Something is illicit if it is illegal.